// utils/GlobalInactivityManager.js

export class GlobalInactivityManager {
    constructor(callback, timeout = 60000) {
        this.callback = callback
        this.timeout = timeout
        this.timer = null
        this.isPaused = false
        this.lastActivityTime = 0
        this.THROTTLE_DELAY = 300

        this.lowFreqEvents = ['mousedown', 'click', 'keydown', 'touchstart']
        this.highFreqEvents = ['mousemove', 'scroll', 'wheel', 'pointermove']
    }

    resetTimer = () => {
        if (this.isPaused) return
        if (this.timer) clearTimeout(this.timer)
        this.timer = setTimeout(() => {
            this.callback()
            this.pause()
        }, this.timeout)
    }

    handleUserActivity = () => {
        const now = Date.now()
        if (now - this.lastActivityTime > this.THROTTLE_DELAY) {
            this.lastActivityTime = now
            this.resetTimer()
        }
    }

    handleVisibilityChange = () => {
        if (document.hidden) {
            this.pause()
        } else {
            this.resume()
        }
    }

    start() {
        if (this.isPaused) return
        this.resetTimer()

        this.lowFreqEvents.forEach(event => {
            document.addEventListener(event, this.resetTimer, true)
        })
        this.highFreqEvents.forEach(event => {
            document.addEventListener(event, this.handleUserActivity, true)
        })
        document.addEventListener('visibilitychange', this.handleVisibilityChange)
    }

    pause() {
        this.isPaused = true
        if (this.timer) clearTimeout(this.timer)

        this.lowFreqEvents.forEach(event => {
            document.removeEventListener(event, this.resetTimer, true)
        })
        this.highFreqEvents.forEach(event => {
            document.removeEventListener(event, this.handleUserActivity, true)
        })
        document.removeEventListener('visibilitychange', this.handleVisibilityChange)
    }

    resume() {
        this.isPaused = false
        this.start() // 现在 this 指向正确，事件能正常绑定和触发
    }

    destroy() {
        this.pause()
        this.callback = null
    }
}